Table 3

Results of the factorial design ANOVA and Tukey HSD post hoc test (at P < 0.05) on the effect of stocking season, lake area (S = Siófok, Sz = Szemes and K = Keszthely basin), method (shore vs. offshore release) and fish size groups (M1 to M5 represent increasing fish mass) on arcsin square root transformed 1460 days recapture rate by anglers (%), and log10(x + 1) transformed days spent in lake and distance travelled between release and recapture sites of tagged pikeperch in Lake Balaton. Since size of stocked fish varied between seasons, thus when full model indicated seasonal variability, main effect of season was also tested for each size group separately.

Recapture rate

Tukey HSD

Days in lake

Tukey HSD

Distance travelled

Tukey HSD

d.f.

F

P

d.f.

F

P

d.f.

F

P

Season

1

12.9

0.001

Autumn>Spring

1

20.4

<0.001

Autumn > Spring

1

3.0

0.084

Area

2

24.8

<0.001

K > Sz > S

2

1.9

0.155

2

31.9

<0.001

S, Sz > K

Method

1

4.6

0.041

Shore>Offshore

1

0.0

0.925

1

0.1

0.716

Fish size

4

31.9

<0.001

M5 > M4 > M3 > M2 > M1

4

4.3

0.002

M1, M2 > M4, M5

4

3.2

0.014

M5, M4, M3 > M1

Season × area

2

4.9

0.014

2

2.2

0.115

2

0.3

0.730

Season × method

1

0.9

0.343

1

0.7

0.392

1

0.1

0.766

Area × method

2

6.4

0.005

2

0.3

0.759

2

0.2

0.860

Season × fish size

4

1.9

0.144

4

0.1

0.977

4

0.7

0.595

Area × fish size

8

1.0

0.478

8

1.0

0.449

8

2.4

0.013

Method × fish size

4

1.6

0.196

4

0.4

0.821

4

0.9

0.463

Error

30

492

491

Main effect of season by size groups

M1 (≤150 g)

1;7

4.0

0.085

1;54

1.5

0.232

M2 (151–200 g)

1;7

4.6

0.070

1;93

6.5

0.012

Autumn > Spring

M3 (201–250 g)

1;7

4.4

0.073

1;127

7.7

0.006

Autumn > Spring

M4 (251–300 g)

1;7

3.3

0.110

1;139

6.8

0.010

Autumn > Spring

M5 (>300 g)

1;7

0.1

0.804

1;84

4.1

0.047

NS

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